From 52f2c42e54b68400916b59294ec46d2e41e27d95 Mon Sep 17 00:00:00 2001
From: Alexey Matveichev <>
Date: Mon, 8 Sep 2025 11:12:54 +0100
Subject: [PATCH] BUG: InjectionModelList: avoid an FPE instance while using
 spray cloud (fixes #3413)

---
 .../InjectionModel/InjectionModel/InjectionModelList.C          | 2 +-
 .../PatchFlowRateInjection/PatchFlowRateInjection.C             | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/InjectionModel/InjectionModelList.C b/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/InjectionModel/InjectionModelList.C
index a4cc84a305..c174efac05 100644
--- a/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/InjectionModel/InjectionModelList.C
+++ b/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/InjectionModel/InjectionModelList.C
@@ -163,7 +163,7 @@ Foam::scalar Foam::InjectionModelList<CloudType>::averageParcelMass()
         massTotal += mt;
     }
 
-    return mass/massTotal;
+    return mass/stabilise(massTotal, SMALL);
 }
 
 
diff --git a/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/PatchFlowRateInjection/PatchFlowRateInjection.C b/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/PatchFlowRateInjection/PatchFlowRateInjection.C
index ee813b1c83..938798edfd 100644
--- a/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/PatchFlowRateInjection/PatchFlowRateInjection.C
+++ b/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/PatchFlowRateInjection/PatchFlowRateInjection.C
@@ -79,6 +79,8 @@ Foam::PatchFlowRateInjection<CloudType>::PatchFlowRateInjection
     // - will be reset during each injection
     this->volumeTotal_ = 0.0;
     this->massTotal_ = 0.0;
+
+    volumeToInject(time.value(), time.value() + duration_);
 }